Not man made or artificial in any way. 13 mm x 8 mm. This stone is a lovely natural very bright gem. It would make a stunning pendant stone or ring stone.This item will be posted express. Simply let me know when you have finished shopping and I will combine for you. Check out my other items. Be sure to add me to your favorites list. PLEASE VISIT MY E-BAY STORE FOR FINE QUALITY GEMS AND JEWELLERY. This item is in the category "Jewellery & Watches\Loose Diamonds & Gemstones\Loose Gemstones". The seller is "peterhoppen" and is located in this country: AU. This item can be shipped worldwide.